Table of Contents
Charging of Insulators
Since charge cannot flow through insulators, neither conduction nor induction can be used to charge, insulators, so in order to charge an insulator friction is used. Whenever an insulator is rubbed against a body exchange of electrons takes place between the two. This results in appearance of equal and opposite charges on the insulator and the other body. Thus the insulator is charged.
For example rubbing of plastic with fur, silk with glass causes charging of these things.
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Reynolds Number
Last modified on:3 years agoReading Time:10MinutesWhat is Reynolds Number? The Reynolds number (Re) is a dimensionless parameter used in fluid mechanics to characterize the flow of a fluid (liquid or gas) around an object or through a conduit. It relates the inertial forces to the viscous forces in the fluid and helps determine the type of…
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Numerical Problems Based on Composition of Vectors for Class 11 Physics
Last modified on:5 months agoReading Time:9Minutes Numerical Problems Based on Composition of Vectors for Class 11 Physics Numerical Problems on Vector Addition Class 11 Physics · Motion in a Plane SQ Vector Addition Practice Set Apply the parallelogram law of vector addition: $R = \sqrt{A^2 + B^2 + 2AB\cos\theta}$ Ch 4 · Motion in a Plane…
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Numerical Problems Based on Relative Velocity in 1D for Class 11 Physics
Last modified on:5 months agoReading Time:9Minutes Numerical Problems on Relative Velocity Class 11 Physics · Motion in a Straight Line SQ Relative Velocity Practice Set Apply the relative velocity formula $v_{AB} = v_A – v_B$ Ch 3 · Motion in a Straight Line 1 A jet airplane travelling at the speed of $450\text{ kmh}^{-1}$ ejects the…
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Numerical Problems Based on Position-Time and Velocity-Time Graphs for Class 11 Physics
Last modified on:5 months agoReading Time:17Minutes Numerical Problems Based on Position-Time and Velocity-Time Graphs for Class 11 Physics 1 Figure 3.64 shows the position-time graphs of three cars A, B and C. On the basis of the graphs, answer the following questions: (i) Which car has the highest speed and which the lowest? (ii) Are the…
